how to lock or pin a point to a specified primitive and uv ?

[carthick]

i have a mesh and a number of points(on the surface) . i use xyzdist to get the closest prim and uv .

 

how do i use this information and pin the points on a deforming geo ? thanks in advance.

 

 

test file <pin2geo.hipnc >

[ryew]

Unless your geometry topology will be changing across the framerange, any reason not to just use a rest position for the points as is typically done when sticking points to geo? (https://www.tokeru.com/cgwiki/index.php?title=Rest_Attrib)

Edited January 22, 2021 by ryew
Additional resource info

[carthick]

8 hours ago, ryew said:

Unless your geometry topology will be changing across the framerange, any reason not to just use a rest position for the points as is typically done when sticking points to geo? (https://www.tokeru.com/cgwiki/index.php?title=Rest_Attrib)

hey Ryew !

 

thanks for the idea using rest sop.. checked the tokeru page. and tried out the rest sop. but looks like it only saves the world position ,

I need to lock the points on the surface geometry( like follicles in maya, they are like rivets on the surface constrained by u and v .

the rotate rest fails just when i move the points away from the origin and rotate it.

thanks for the reply !

 

 

Edited January 23, 2021 by carthick
typo

[Ultraman]

like this ?

also you can use point deform is have more option 

pin3geo.hipnc

[KarlRichter]

you can use the "attribute interpolate" SOP, or the "primitive attribute" vop to do what you want.